Puncture guide cannula

Abstract

A puncture guide cannula effectively solves the problems that when an existing puncture needle enters a uterine cavity from a cervical canal, the wall of the cervical canal and the muscular wall of the uterine cavity are prone to being touched, needle inserting is difficult, and working efficiency is reduced. Comprising a sleeve in the left-right axial direction, the front side of the sleeve is provided with a notch which is through in the left-right direction and the inside-outside direction, the left side of the sleeve is provided with a plurality of receding grooves which are provided with leftward openings and distributed along the outer edge face of the sleeve, and a pin shaft perpendicular to the axis of the sleeve is fixed in each receding groove and rotationally connected with an inverted-L-shaped bent rod; the free end of the bent rod leftwards extends out of the sleeve and is fixedly provided with an arc-shaped plate; the intrauterine device is ingenious in structure and convenient to use, the tip of a puncture needle can be guided and protected when entering a uterine cavity, the tip of the puncture needle is prevented from making contact with the wall of a cervical canal and the wall of the uterine cavity muscle, the needle inserting process can be conducted smoothly, the inverted-L-shaped rod is pulled rightwards so that the arc-shaped plates can be opened, the cannula can be moved rightwards and pulled backwards, and the puncture needle can be inserted into the uterine cavity. And the sleeve can be conveniently taken off from the puncture needle, and is simple to operate and easy to popularize and use.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical auxiliary instrument technical field, especially a puncture guide sleeve. BACKGROUND

[0002] The radio frequency ablation treatment of gynecology is the radio frequency therapeutic instrument using ablation and cutting function, under the action of radio frequency heat effect, makes tissue coagulation necrosis, plays the effect of eliminating wart, cyst, polyp, myoma and the like disease, therefore, if the female has cervical polyp, uterine fibroid or malignant uterine tumor and the like disease, can choose to do the radio frequency ablation treatment of gynecology under the guidance of the doctor;

[0003] The puncture needle tip of the radio frequency ablation treatment is sharp at present, is convenient for puncture into the tissue, but when entering the uterine cavity from the vagina, cervical canal, because the puncture needle tip is very sharp, and the cervical canal cavity and uterine cavity are small, therefore, the puncture needle tip is easy to touch the cervical canal wall and uterine cavity muscle wall, leads to the needle insertion process difficult, prolongs the operation time, reduces the work efficiency of medical staff, increases the patient's pain. UTILITARIAN CONTENT

[0004] In view of above-mentioned situation, for overcoming the defects of prior art, the purpose of the utility model is to provide a puncture guide sleeve, effectively solve the problem that the existing puncture needle enters the uterine cavity from the cervical canal, is easy to touch the cervical canal wall and uterine cavity muscle wall, leads to the needle insertion difficult and reduces the work efficiency.

[0005] Its solution technical scheme is, the utility model includes the sleeve of left and right axial direction, the front side of sleeve is provided with the notch that is all through to left and right and inside and outside, the left side of sleeve is provided with multiple opening left and is distributed along its outer edge surface The accommodation slot, the notch is located between the two accommodation slots of front side and upper side, each accommodation slot is fixed with the pin shaft perpendicular to the sleeve axis, the pin shaft is rotatably connected with the inverted L-shaped bending rod, multiple bending rods can swing simultaneously, the free end of bending rod extends out of the sleeve to the left and is fixed with the arc plate, multiple arc plates can form a hemispherical shape.

[0006] Compared with the prior art, the utility model has the following beneficial effects:

[0007] The utility model has the advantages of clever structure and convenient use, sets up the sleeve and multiple arc plates that can swing simultaneously, can guide and protect the tip of puncture needle when entering the uterine cavity, prevent the tip of puncture needle from touching the cervical canal wall and uterine cavity muscle wall, facilitate the needle insertion process to proceed smoothly;

[0008] The V-shaped plate, the hook are arranged, the sleeve is prevented from sliding, the stability of the sleeve is increased when the needle is inserted, the sleeve is prevented from repeatedly touching the arc-shaped plate by the tip of the puncture needle, the notch and the inverted L-shaped rod are arranged, the plurality of arc-shaped plates are opened by pulling the inverted L-shaped rod to the right, the sleeve is moved to the right and pulled back, the sleeve is conveniently taken off from the puncture needle, the operation is simple, and the sleeve is easy to popularize and use. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is the axonometric view of the utility model.

[0010] Figure 2 is the full cross-sectional front view of the utility model.

[0011] Figure 3 is the partial axonometric view of the utility model after the sleeve is removed.

[0012] Figure 4 is the cross-sectional left view of the utility model.

[0013] Figure 5 is the left view of the utility model along the pin shaft axis.

[0014] Figure 6 is the bottom axonometric view of the utility model. DETAILED DESCRIPTION

[0015] The specific embodiments of the utility model are further described in detail below in combination with the drawings.

[0016] By Figures 1 to 6 Given, including left and right axial sleeve 1, sleeve 1 front side is provided with left and right and inside and outside through gap 2, sleeve 1 left side is provided with multiple openings left and along its outer edge surface distribution's give way slot, gap 2 is located between the two give way slots of the front side and the upper side, each give way slot is fixed with the pin shaft perpendicular to the axis of sleeve 1, the pin shaft is rotatably connected with the inverted L-shaped bent rod 3, multiple bent rods 3 can simultaneously swing, the free end of bent rod 3 extends out of sleeve 1 to the left and is fixed with arc-shaped plate 4, multiple arc-shaped plates 4 can form a hemispherical shape.

[0017] In order to make multiple bent rods 3 can simultaneously swing, the sleeve 1 is provided with C-shaped groove, each give way slot right side is communicated with C-shaped groove, C-shaped block 5 is slidably connected in C-shaped groove, the left end of C-shaped block 5 is fixed with multiple corresponding connecting ropes 6 of bent rod 3, connecting rope 6 is fixedly connected with the corner of corresponding bent rod 3, each C-shaped block 5 and C-shaped groove right end surface are connected through compression spring 7.

[0018] In order to facilitate the operation C type block 5 sliding, the sleeve 1 right side is provided with inverted L type moving groove, the moving groove right end upper side is communicated with the outside, the moving groove is slidably connected with inverted L type rod 8, the inverted L type rod 8 right side free end extends out of the moving groove, the inverted L type rod 8 left end is fixed with pull rope 9, and the pull rope 9 free end penetrates the sleeve 1 and is fixedly connected with compression spring 7 and C type block 5.

[0019] In order to increase the stability of sleeve 1 when entering the cervical canal with puncture needle, the sleeve 1 right end upper side is fixed with V type plate 10 with opening downward, the sleeve 1 right end lower side is fixed with hook 11, the hook 11 right end is curved upward, the left end surface of the hook 11 upper side is left high right low inclined surface, the V type plate 10 right side lower end surface is left high right low inclined surface, the V type plate 10 and hook 11 are all provided with left and right through semicircular groove 12, the two semicircular grooves 12 openings are opposite, when the V type plate 10 is buckled on the hook 11, the two semicircular grooves 12 form a circle and the inner diameter is slightly smaller than the outer diameter of puncture needle.

[0020] In order to increase the convenience when using, the length of sleeve 1 is 10 cm.

[0021] The sleeve 1 and arc-shaped plate 4 are made of hard PVC material.

[0022] The V type plate 10 and hook 11 are made of ABS or PP material.

[0023] When using, the device is packaged by disposable packaging bag and is disposable, a plurality of arc-shaped plates 4 form a hemispherical shape, the compression spring 7 is not compressed, and the V type plate 10 is not buckled on the hook 11 in the initial state; when radiofrequency ablation treatment is needed in the uterine cavity of the patient, the medical staff opens the disposable packaging bag, takes out the sleeve 1, inserts the puncture needle tip into the sleeve 1 from the left between the V type plate 10 and the hook 11, presses the right end of the V type plate 10 downward, the right end of the V type plate 10 is bent downward and the lower inclined surface thereof extrudes the upper left end of the hook 11, so that the hook 11 is deformed and the right end thereof moves to the right, the V type plate 10 and the hook 11 are buckled, and the inclined surface of the hook 11 prevents the right end of the V type plate 10 from moving upward, therefore, the inner surfaces of the two semicircular grooves 12 tightly wrap the outer surface of the puncture needle, the sleeve 1 is fixed on the puncture needle, the sleeve 1 is prevented from moving when the puncture needle enters the patient's body, the puncture needle and the arc-shaped plate 4 collide with each other many times, the tip of the puncture needle is damaged, and the smooth puncture is affected.

[0024] When the sleeve 1 and the puncture needle enter the uterine cavity, the right end of the hook 11 is pulled to the right, the upper side of the hook 11 is released from the restriction of the V-shaped plate 10, the V-shaped plate 10 is reset upward under the action of the elastic force stored when it is bent downward, the V-shaped plate 10 is disengaged from the hook 11, the two semicircular grooves 12 no longer wrap the puncture needle, the medical staff pulls the inverted L-shaped rod 8 to the right, the inverted L-shaped rod 8 pulls the pull rope 9 to move to the right, the C-shaped block 5 drives the multiple bent rods 3 to swing around the pin shaft through the multiple connecting ropes 6, the compression spring 7 is compressed, the multiple arc-shaped plates 4 swing in opposite directions, the current state is maintained, the sleeve 1 is moved to the right, the sleeve 1 is gradually removed from the patient's body, then the sleeve 1 is pulled backward from the right end, the right side of the puncture needle is pulled out of the sleeve 1 from the gap 2, the sleeve 1 is continuously moved to the right and pulled backward, until the sleeve 1 is completely removed from the puncture needle, the operation is simple, the puncture needle can be effectively prevented from piercing normal tissues when entering the uterine cavity, and the smooth progress of radiofrequency ablation treatment is beneficial.

Claims

1. A puncture guidance cannula, comprising a cannula (1) oriented laterally, characterized in that, The sleeve (1) has a notch (2) that is open to the left and right and inside and outside. The sleeve (1) has multiple relief grooves with openings facing left and distributed along its outer edge. The notch (2) is located between the two relief grooves on the front and upper sides. Each relief groove has a pin that is perpendicular to the axis of the sleeve (1). The pin is rotatably connected to an inverted L-shaped bent rod (3). Multiple bent rods (3) can swing at the same time. The free end of the bent rod (3) extends to the left of the sleeve (1) and is fixed with an arc plate (4). Multiple arc plates (4) can form a hemispherical shape.

2. The puncture guide cannula according to claim 1, characterized in that, The sleeve (1) is provided with a C-shaped groove. The right side of each clearance groove is connected to the C-shaped groove. A C-shaped block (5) is slidably connected in the C-shaped groove. Multiple connecting ropes (6) corresponding to the bent rod (3) are fixed at the left end of the C-shaped block (5). The connecting ropes (6) are fixedly connected to the corner of the corresponding bent rod (3). Each C-shaped block (5) is connected to the right end face of the C-shaped groove by a compression spring (7).

3. The puncture guide cannula according to claim 1, characterized in that, The sleeve (1) has an inverted L-shaped moving groove on the right side. The upper right side of the moving groove is connected to the outside. An inverted L-shaped rod (8) is slidably connected in the moving groove. The free end of the inverted L-shaped rod (8) extends out of the moving groove. A pull rope (9) is fixed to the left end of the inverted L-shaped rod (8). The free end of the pull rope (9) passes through the sleeve (1) and the compression spring (7) and is fixedly connected to the C-shaped block (5).

4. The puncture guide cannula according to claim 1, characterized in that, The upper right side of the sleeve (1) is fixed with a V-shaped plate (10) with the opening facing downward, and the lower right side of the sleeve (1) is fixed with a hook (11). The right end of the hook (11) is bent upward, and the left end face of the upper side of the hook (11) is an inclined surface with the left side higher than the right side. The lower right end face of the V-shaped plate (10) is an inclined surface with the left side higher than the right side. Both the V-shaped plate (10) and the hook (11) are provided with semi-circular grooves (12) that pass through from left to right. The openings of the two semi-circular grooves (12) are opposite each other. When the V-shaped plate (10) is fastened to the hook (11), the two semi-circular grooves (12) form a circle and its inner diameter is slightly smaller than the outer diameter of the puncture needle.

5. The puncture guide cannula according to claim 1, characterized in that, The sleeve (1) is 10cm long.

6. The puncture guiding cannula according to claim 1, characterized in that, Both the sleeve (1) and the arc plate (4) are made of rigid PVC material.

7. A puncture guiding cannula according to claim 4, characterized in that, The V-shaped plate (10) and the hook (11) are made of ABS or PP material.

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